Lucerne V8-4.6L (2008)
9. Install the J 21867 flexible hose to the J 42907.
10. Run the engine and measure the engine oil pressure.
11. Compare the readings toEngine Mechanical Specifications (LD8) (See: Specifications/Service Limit & General Specifications/Engine Mechanical
Specifications (LD8))Engine Mechanical Specifications (L37) (See: Specifications/Service Limit & General Specifications/Engine Mechanical
Specifications (L37)).
12. If the engine oil pressure is below specifications, inspect the engine for 1 or more of the following conditions:
*
Oil pump worn or dirty. Refer to Oil Pump Replacement (See: Oil Pump/Service and Repair) ,Oil Pump Disassemble (See: Service and
Repair/Overhaul) andOil Pump Cleaning and Inspection (See: Service and Repair/Overhaul).
*
Oil pump-to-engine block bolts loose. Refer to Oil Pump Replacement (See: Oil Pump/Service and Repair).
*
Oil pump screen loose, plugged, or damaged. Refer to Oil Pump Suction Pipe and Screen Assembly Replacement (See: Oil Pick
Up/Strainer/Service and Repair).
*
Oil pump screen O-ring seal missing or damaged. Refer to Oil Pump Suction Pipe and Screen Assembly Replacement (See: Oil Pick
Up/Strainer/Service and Repair).
*
Oil pump pressure relief valve malfunction. Refer to Oil Pump Replacement (See: Oil Pump/Service and Repair).
*
Engine bearing clearance excessive. Refer to Crankshaft and Bearing Cleaning and Inspection (See: Service and Repair/Overhaul) , Crankshaft
and Bearing Installation (See: Service and Repair/Overhaul) andPiston, Connecting Rod, and Bearing Installation (See: Service and
Repair/Overhaul).
*
Cracked, porous, or restricted oil galleries.
*
Oil gallery plugs missing or incorrectly installed. Refer to Engine Block Assemble - Upper (See: Service and Repair/Overhaul) and Cylinder
Head Assemble (See: Service and Repair/Overhaul).
*
Valve lifters broken. Repair, as necessary. Refer to Valve Lifter Replacement - Left Side (See: Camshaft, Lifters and Push Rods/Lifter / Lash
Adjuster/Service and Repair/Valve Lifter Replacement - Left Side) and/or Valve Lifter Replacement - Right Side (See: Camshaft, Lifters and
Push Rods/Lifter / Lash Adjuster/Service and Repair/Valve Lifter Replacement - Right Side) andValve Lifters Cleaning and Inspection (See:
Service and Repair/Overhaul).
*
Crankshaft balancer bolt missing, loose or under-torqued.
13. If the oil pressure reading on the J 21867 , or equivalent, is within specifications, inspect for the following conditions:
*
Plugged or incorrect oil filter and/or malfunctioning oil bypass valve. Refer to Engine Oil and Oil Filter Replacement (See: Engine Oil/Service
and Repair).
*
Malfunctioning oil pressure gage or sensor. Repair, as necessary. Refer to Engine Oil Pressure Sensor and/or Switch Replacement (See: Oil
Pressure Sensor/Service and Repair).
